/* $NetBSD: misc.c,v 1.1.1.2 2018/08/16 18:17:47 jmcneill Exp $ */
/*++
Copyright (c) 1998 Intel Corporation
Module Name:
misc.c
Abstract:
Revision History
--*/
#include "lib.h"
//
//
//
VOID *
AllocatePool (
IN UINTN Size
)
{
EFI_STATUS Status;
VOID *p;
Status = uefi_call_wrapper(BS->AllocatePool, 3, PoolAllocationType, Size, &p);
if (EFI_ERROR(Status)) {
DEBUG((D_ERROR, "AllocatePool: out of pool %x\n", Status));
p = NULL;
}
return p;
}
VOID *
AllocateZeroPool (
IN UINTN Size
)
{
VOID *p;
p = AllocatePool (Size);
if (p) {
ZeroMem (p, Size);
}
return p;
}
VOID *
ReallocatePool (
IN VOID *OldPool,
IN UINTN OldSize,
IN UINTN NewSize
)
{
VOID *NewPool;
NewPool = NULL;
if (NewSize) {
NewPool = AllocatePool (NewSize);
}
if (OldPool) {
if (NewPool) {
CopyMem (NewPool, OldPool, OldSize < NewSize ? OldSize : NewSize);
}
FreePool (OldPool);
}
return NewPool;
}
VOID
FreePool (
IN VOID *Buffer
)
{
uefi_call_wrapper(BS->FreePool, 1, Buffer);
}
VOID
ZeroMem (
IN VOID *Buffer,
IN UINTN Size
)
{
RtZeroMem (Buffer, Size);
}
VOID
SetMem (
IN VOID *Buffer,
IN UINTN Size,
IN UINT8 Value
)
{
RtSetMem (Buffer, Size, Value);
}
VOID
CopyMem (
IN VOID *Dest,
IN CONST VOID *Src,
IN UINTN len
)
{
RtCopyMem (Dest, Src, len);
}
INTN
CompareMem (
IN CONST VOID *Dest,
IN CONST VOID *Src,
IN UINTN len
)
{
return RtCompareMem (Dest, Src, len);
}
BOOLEAN
GrowBuffer(
IN OUT EFI_STATUS *Status,
IN OUT VOID **Buffer,
IN UINTN BufferSize
)
/*++
Routine Description:
Helper function called as part of the code needed
to allocate the proper sized buffer for various
EFI interfaces.
Arguments:
Status - Current status
Buffer - Current allocated buffer, or NULL
BufferSize - Current buffer size needed
Returns:
TRUE - if the buffer was reallocated and the caller
should try the API again.
--*/
{
BOOLEAN TryAgain;
//
// If this is an initial request, buffer will be null with a new buffer size
//
if (!*Buffer && BufferSize) {
*Status = EFI_BUFFER_TOO_SMALL;
}
//
// If the status code is "buffer too small", resize the buffer
//
TryAgain = FALSE;
if (*Status == EFI_BUFFER_TOO_SMALL) {
if (*Buffer) {
FreePool (*Buffer);
}
*Buffer = AllocatePool (BufferSize);
if (*Buffer) {
TryAgain = TRUE;
} else {
*Status = EFI_OUT_OF_RESOURCES;
}
}
//
// If there's an error, free the buffer
//
if (!TryAgain && EFI_ERROR(*Status) && *Buffer) {
FreePool (*Buffer);
*Buffer = NULL;
}
return TryAgain;
}
EFI_MEMORY_DESCRIPTOR *
LibMemoryMap (
OUT UINTN *NoEntries,
OUT UINTN *MapKey,
OUT UINTN *DescriptorSize,
OUT UINT32 *DescriptorVersion
)
{
EFI_STATUS Status;
EFI_MEMORY_DESCRIPTOR *Buffer;
UINTN BufferSize;
//
// Initialize for GrowBuffer loop
//
Status = EFI_SUCCESS;
Buffer = NULL;
BufferSize = sizeof(EFI_MEMORY_DESCRIPTOR);
//
// Call the real function
//
while (GrowBuffer (&Status, (VOID **) &Buffer, BufferSize)) {
Status = uefi_call_wrapper(BS->GetMemoryMap, 5, &BufferSize, Buffer, MapKey, DescriptorSize, DescriptorVersion);
}
//
// Convert buffer size to NoEntries
//
if (!EFI_ERROR(Status)) {
*NoEntries = BufferSize / *DescriptorSize;
}
return Buffer;
}
VOID *
LibGetVariableAndSize (
IN CHAR16 *Name,
IN EFI_GUID *VendorGuid,
OUT UINTN *VarSize
)
{
EFI_STATUS Status;
VOID *Buffer;
UINTN BufferSize;
//
// Initialize for GrowBuffer loop
//
Buffer = NULL;
BufferSize = 100;
//
// Call the real function
//
while (GrowBuffer (&Status, &Buffer, BufferSize)) {
Status = uefi_call_wrapper(
RT->GetVariable,
5,
Name,
VendorGuid,
NULL,
&BufferSize,
Buffer
);
}
if (Buffer) {
*VarSize = BufferSize;
} else {
*VarSize = 0;
}
return Buffer;
}
VOID *
LibGetVariable (
IN CHAR16 *Name,
IN EFI_GUID *VendorGuid
)
{
UINTN VarSize;
return LibGetVariableAndSize (Name, VendorGuid, &VarSize);
}
EFI_STATUS
LibDeleteVariable (
IN CHAR16 *VarName,
IN EFI_GUID *VarGuid
)
{
VOID *VarBuf;
EFI_STATUS Status;
VarBuf = LibGetVariable(VarName,VarGuid);
Status = EFI_NOT_FOUND;
if (VarBuf) {
//
// Delete variable from Storage
//
Status = uefi_call_wrapper(
RT->SetVariable,
5,
VarName, VarGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
0, NULL
);
ASSERT (!EFI_ERROR(Status));
FreePool(VarBuf);
}
return (Status);
}
EFI_STATUS
LibSetNVVariable (
IN CHAR16 *VarName,
IN EFI_GUID *VarGuid,
IN UINTN DataSize,
IN VOID *Data
)
{
EFI_STATUS Status;
Status = uefi_call_wrapper(
RT->SetVariable,
5,
VarName, VarGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
DataSize, Data
);
ASSERT (!EFI_ERROR(Status));
return (Status);
}
EFI_STATUS
LibSetVariable (
IN CHAR16 *VarName,
IN EFI_GUID *VarGuid,
IN UINTN DataSize,
IN VOID *Data
)
{
EFI_STATUS Status;
Status = uefi_call_wrapper(
RT->SetVariable,
5,
VarName, VarGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
DataSize, Data
);
ASSERT (!EFI_ERROR(Status));
return (Status);
}
EFI_STATUS
LibInsertToTailOfBootOrder (
IN UINT16 BootOption,
IN BOOLEAN OnlyInsertIfEmpty
)
{
UINT16 *BootOptionArray;
UINT16 *NewBootOptionArray;
UINTN VarSize;
UINTN Index;
EFI_STATUS Status;
BootOptionArray = LibGetVariableAndSize (VarBootOrder, &EfiGlobalVariable, &VarSize);
if (VarSize != 0 && OnlyInsertIfEmpty) {
if (BootOptionArray) {
FreePool (BootOptionArray);
}
return EFI_UNSUPPORTED;
}
VarSize += sizeof(UINT16);
NewBootOptionArray = AllocatePool (VarSize);
for (Index = 0; Index < ((VarSize/sizeof(UINT16)) - 1); Index++) {
NewBootOptionArray[Index] = BootOptionArray[Index];
}
//
// Insert in the tail of the array
//
NewBootOptionArray[Index] = BootOption;
Status = uefi_call_wrapper(
RT->SetVariable,
5,
VarBootOrder, &EfiGlobalVariable,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
VarSize, (VOID*) NewBootOptionArray
);
if (NewBootOptionArray) {
FreePool (NewBootOptionArray);
}
if (BootOptionArray) {
FreePool (BootOptionArray);
}
return Status;
}
BOOLEAN
ValidMBR(
IN MASTER_BOOT_RECORD *Mbr,
IN EFI_BLOCK_IO *BlkIo
)
{
UINT32 StartingLBA, EndingLBA;
UINT32 NewEndingLBA;
INTN i, j;
BOOLEAN ValidMbr;
if (Mbr->Signature != MBR_SIGNATURE) {
//
// The BPB also has this signature, so it can not be used alone.
//
return FALSE;
}
ValidMbr = FALSE;
for (i=0; i<MAX_MBR_PARTITIONS; i++) {
if ( Mbr->Partition[i].OSIndicator == 0x00 || EXTRACT_UINT32(Mbr->Partition[i].SizeInLBA) == 0 ) {
continue;
}
ValidMbr = TRUE;
StartingLBA = EXTRACT_UINT32(Mbr->Partition[i].StartingLBA);
EndingLBA = StartingLBA + EXTRACT_UINT32(Mbr->Partition[i].SizeInLBA) - 1;
if (EndingLBA > BlkIo->Media->LastBlock) {
//
// Compatability Errata:
// Some systems try to hide drive space with thier INT 13h driver
// This does not hide space from the OS driver. This means the MBR
// that gets created from DOS is smaller than the MBR created from
// a real OS (NT & Win98). This leads to BlkIo->LastBlock being
// wrong on some systems FDISKed by the OS.
//
//
if (BlkIo->Media->LastBlock < MIN_MBR_DEVICE_SIZE) {
//
// If this is a very small device then trust the BlkIo->LastBlock
//
return FALSE;
}
if (EndingLBA > (BlkIo->Media->LastBlock + MBR_ERRATA_PAD)) {
return FALSE;
}
}
for (j=i+1; j<MAX_MBR_PARTITIONS; j++) {
if (Mbr->Partition[j].OSIndicator == 0x00 || EXTRACT_UINT32(Mbr->Partition[j].SizeInLBA) == 0) {
continue;
}
if ( EXTRACT_UINT32(Mbr->Partition[j].StartingLBA) >= StartingLBA &&
EXTRACT_UINT32(Mbr->Partition[j].StartingLBA) <= EndingLBA ) {
//
// The Start of this region overlaps with the i'th region
//
return FALSE;
}
NewEndingLBA = EXTRACT_UINT32(Mbr->Partition[j].StartingLBA) + EXTRACT_UINT32(Mbr->Partition[j].SizeInLBA) - 1;
if ( NewEndingLBA >= StartingLBA && NewEndingLBA <= EndingLBA ) {
//
// The End of this region overlaps with the i'th region
//
return FALSE;
}
}
}
//
// Non of the regions overlapped so MBR is O.K.
//
return ValidMbr;
}
UINT8
DecimaltoBCD(
IN UINT8 DecValue
)
{
return RtDecimaltoBCD (DecValue);
}
UINT8
BCDtoDecimal(
IN UINT8 BcdValue
)
{
return RtBCDtoDecimal (BcdValue);
}
EFI_STATUS
LibGetSystemConfigurationTable(
IN EFI_GUID *TableGuid,
IN OUT VOID **Table
)
{
UINTN Index;
for(Index=0;Index<ST->NumberOfTableEntries;Index++) {
if (CompareGuid(TableGuid,&(ST->ConfigurationTable[Index].VendorGuid))==0) {
*Table = ST->ConfigurationTable[Index].VendorTable;
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
CHAR16 *
LibGetUiString (
IN EFI_HANDLE Handle,
IN UI_STRING_TYPE StringType,
IN ISO_639_2 *LangCode,
IN BOOLEAN ReturnDevicePathStrOnMismatch
)
{
UI_INTERFACE *Ui;
UI_STRING_TYPE Index;
UI_STRING_ENTRY *Array;
EFI_STATUS Status;
Status = uefi_call_wrapper(BS->HandleProtocol, 3, Handle, &UiProtocol, (VOID *)&Ui);
if (EFI_ERROR(Status)) {
return (ReturnDevicePathStrOnMismatch) ? DevicePathToStr(DevicePathFromHandle(Handle)) : NULL;
}
//
// Skip the first strings
//
for (Index = UiDeviceString, Array = Ui->Entry; Index < StringType; Index++, Array++) {
while (Array->LangCode) {
Array++;
}
}
//
// Search for the match
//
while (Array->LangCode) {
if (strcmpa (Array->LangCode, LangCode) == 0) {
return Array->UiString;
}
}
return (ReturnDevicePathStrOnMismatch) ? DevicePathToStr(DevicePathFromHandle(Handle)) : NULL;
}